Jeep jk code p0128 - P0128 Code (2017 Jeep JK) I got a code this morning on my way to work and after scanning saw that it was p0128. After researching a bit it looks like my coolant isn’t getting hot enough due to the tstat being stuck open.

 
Feb 17, 2020 · 548 posts · Joined 2014. #1 · Feb 17, 2020. Hi all. I got DTC code P0128 this morning - probably stuck thermostat. 2015 JKU with almost 80K... so probably it's time. Jeep is covered with lifetime powertrain warranty. . Sound of freedom fresno

Apr 12, 2021 · 21. Location. Louisiana. Jan 6, 2023. #1. I need a reliable and quick response to my concern. My check engine light is on and I checked for the code. It shows me the P0128 code related to the coolant system running low temperature. I read somewhere that the risk is low, but should get it checked out within a month. 2016 wrangler p0128. Got a 2016 wrangler with the 3.6l getting a code p0128. question the temp sensor cause it warms up fast and is normal on the gauge dash says 190 normal driving but got up to 220 today sitting and the fan never kicked on. Question is what is the normal operating temperature saw somewhere the fan won’t kick on till 240?2016 JKUHR Billet Silver M/T - (current odometer 54k, paid $35,500 OTD with 13.3k miles on 2/17/2018) - AEV 2.5 + Geo - Milestar 315 Patagona Mt's - Pro Comp 7069 FB Wheels - Rugged Ridge Hurricane Fender Flares - Poison Spider Bruisers and Rocker Knockers - RR Pioneer Platform - Bushwacker Sill Plate - Rigid Ds - Warn VR10-S - Teraflex HD Carrier,TB and SS - AEV Diff Covers - ARB Compact - 2x ...2011 3.8L jeep jk. received P0128 code, replaced thermostat and ECT.. Hooked up a scanner and drove on highway 65mph, coolant temp readings fluctuate between 168 - 175. When stopped or at slower speeds temperature will rise but will suddenly decrease when speed picks up. Stopped and idled noticed fan kicked in and the scanner was only …Save on your password security with Keeper Security promo codes. Get the latest on Keeper Security promo codes, coupons, and May sale on PCWorld. PCWorld’s coupon section is create...Jul 29, 2016 · Don't procrastinate on fixing misfires as they can quickly damage catalytics. as for your p0128, it was likely a history code (unless your check engine was on solid. p0128 will only reset after quite a few cycles (believe 40 from history). No worries as if it did set once, your thermostat was likely losing some performance. P0128 code just popped up this week on a 2016 JK with 86k miles. A local shop charges $225 to replace the thermostat, but really wants to run a full Dx before repairing, at an additional $125. ... Jeep=MOPAR branded parts ONLY with very limited exceptions or you will learn very rapidly how to do things twice . Reactions: awk34. Save …This video goes through Troubleshooting for a P0128 engine code. We go through what problems may be associated and how we decided to change the thermostat vs...The P0128 code is triggered when the engine control module (ECM) detects the engine coolant temperature (ECT) below the thermostat regulating temperature. This …Back in the fall, the P0128 code came up and I changed the Termostat. All was well. Fast forward to now - The P0128 Code came back up along with the P2181 and the P0118 Code. The Check Engine Light is on, and the temperature gauge is showing very low temp and the fan is constantly running. Sometimes the engine doesn't start right …2016, 3.6 Check Engine light P0128 coolant temp code. ... I don’t know if anyone has the FSM for JKs. The values would be in there I’m almost sure. ... A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, …2. The next cause is a problem with the engine coolant temperature sensor or the wiring associated with the sensor. There are two main symptoms for the P0128 code: 1. Heater is not hot enough due to the coolant temperature in the engine being low 2. Car takes too long to warm up, or the temperature gauge does not go up as high as it used to.346 posts · Joined 2013. #1 · Feb 6, 2020. Threw a P0128 code just cruising around town. Deleted code and checked engine coolant. My fluid has always shown just a small amount just visible at bottom of reservoir, which was the case. Had radio talk-show mechanic tell me he had had to replace abnormal amount of engine coolant thermostats due to ...Jan 24, 2024 · 2. Turn the ignition key to the “on” position without starting the engine. 3. Access the scanner’s menu and select “Read Codes” to retrieve the P0128 code. 4. After reading the code, select “Clear Codes” or “Erase Codes” option on the scanner to reset the code. 5. On May 18, JK Lakshmi Cement will report Q4 earnings.Analysts predict JK Lakshmi Cement will report earnings per share of INR 7.57.Go here to watc... JK Lakshmi Cement is reporting...2016 JKUHR Billet Silver M/T - (current odometer 54k, paid $35,500 OTD with 13.3k miles on 2/17/2018) - AEV 2.5 + Geo - Milestar 315 Patagona Mt's - Pro Comp 7069 FB Wheels - Rugged Ridge Hurricane Fender Flares - Poison Spider Bruisers and Rocker Knockers - RR Pioneer Platform - Bushwacker Sill Plate - Rigid Ds - Warn VR10-S - Teraflex HD Carrier,TB and SS - AEV Diff Covers - ARB Compact - 2x ...Tools Used:Milwaukee 2767-20 M18 Fuel High Torque 1/2-Inch Impact Wrench https://amzn.to/INNOVA 3612 Milwaukee Electric Tools 2557-20 M12 Fuel 3/8" RATCHETht... To reset the p0128 code on a jeep wrangler, disconnect the battery for a few minutes and then reconnect it. When the code reappears, it indicates a persistent issue that needs to be fixed. The p0128 code is related to the engine coolant temperature being below the expected range. This could be caused by a faulty thermostat, a coolant leak, or a ... Jul 29, 2016 · Don't procrastinate on fixing misfires as they can quickly damage catalytics. as for your p0128, it was likely a history code (unless your check engine was on solid. p0128 will only reset after quite a few cycles (believe 40 from history). No worries as if it did set once, your thermostat was likely losing some performance. How to fix p0118 p0128 for 2012 jeep Wrangler Sport Engine Coolant Temperature Sensor thermostatHow do I fix code P0118?What repairs can fix the P0118 code?R...P0128 code. I know the fix for the code is 99% of the is a new tstat but I just wanted to ask why the code is causing no effect on the system. The vehicle heats up to normal temp, heat blows and runs fine. The code is tripped because "engine has not reached the required temperature level within a specified amount of time".To diagnose Jeep Error Code P0128, you can follow these steps: Step 1: Check the coolant level: Ensure that the coolant level is within the recommended range. …Before you can reset the P0128 code in your Jeep Wrangler, it is essential to locate the OBD-II port. The OBD-II port is a standardized diagnostic interface that allows you to connect an OBD-II scanner to your vehicle. In most Jeep Wrangler models, the OBD-II port is conveniently located under the dashboard on the driver’s side. ...Aluminum flywheel Aluminum drive shaft ECU flash tuner Cold air intake Large bore throttle body The 5.7 HEMI engine is available in the Dodge, Chrysler and Jeep vehicles, making it...Dec 14, 2019 · What is P0128 Jeep JK Diagnostic Code? This is a DIY video for Jeep JK Thermostat Replacement...Parts:1) Mopar Thermostat w/housing - https://www.amazon.com... 21. Location. Louisiana. Jan 6, 2023. #1. I need a reliable and quick response to my concern. My check engine light is on and I checked for the code. It shows me the P0128 code related to the coolant system running low temperature. I read somewhere that the risk is low, but should get it checked out within a month.The P0128 code and what it means for your car. The P0128 code is a diagnostic trouble code (DTC) for "Engine Coolant Temperature Below Thermostat Regulating Temperature." This code indicates that the engine coolant temperature is not getting hot enough, fast enough. The thermostat is designed to open at a specific …Back in the fall, the P0128 code came up and I changed the Termostat. All was well. Fast forward to now - The P0128 Code came back up along with the P2181 and the P0118 Code. The Check Engine Light is on, and the temperature gauge is showing very low temp and the fan is constantly running. Sometimes the engine doesn't start right …What is the Cost to Diagnose the Code? Labor: 1.0. The cost to diagnose the P1607 Jeep code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Turn on the motor and top off fluid as it fills in, once it doesn’t take no more close the radiator cap. Now let the motor run for a few minutes while it gets hotter and once 5-10 minutes have gone by turn it off and open the bleeder valve. This is how I’ve done it previously. Repeat the bleeder procedure twice or 3 times and you should be ...colorubi. To erase a code, use a scanner tool to remove that specific code. To dump all codes, remove the battery cable for 10 minutes, then reconnect. If you want to erase the adaptive memory completely and set the ECU to a new start up, remove the cable 10 minutes, reattach the cable and turn the key to the run position.Jeep Code P0128 means that your Engine Coolant Temperature is below the thermostat regulating temperature. Simply put, the coolant which helps regulate your engine’s temperature is colder than it …I am getting B16FD code on my 2014 jk which indicates right fog lamp circuit high. Both my fog lamps are working fine. ... P0128. what to do if there's sludge in my radiator overflow ... I have a 2001 Jeep JK Wrangler and need the front fog lights wiring diagram. The front fog lights do not work. I have check both lamps and they are ok.My engine light came on with a P0128 (temp not reaching running temp within 15 mins). The temp gauge started climbing and bouncing between 3/4 and half. The temp on the dash was reaching 235 and 240 which is very hot for this car. Question: The code usually means a bad coolant sensor or a bad thermostat. But these usually fail OPEN …The Jeep Wrangler (JK) is the third generation of the Jeep Wrangler off-road vehicle.The Wrangler was unveiled at the 2006 North American International Auto Show in Detroit, the JK series 2007 Wrangler Unlimited at the 2006 New York Auto Show.. The car's body and chassis were completely redesigned during the era when Jeep was part of …2008 JK getting code P0128. ... I pulled the old key dance trick and got code P0128 - faulty thermostat - so I have changed that AND the coolant temp. sensor but the motor still hacks and snorts; and the engine light flashes when i hit 1500 rpm. ... A forum community dedicated to all jeep owners and enthusiasts. Come join the discussion about ...2011 3.8L jeep jk. received P0128 code, replaced thermostat and ECT.. Hooked up a scanner and drove on highway 65mph, coolant temp readings fluctuate between 168 - 175. When stopped or at slower speeds temperature will rise but will suddenly decrease when speed picks up. Stopped and idled noticed fan kicked in and the scanner was only reading ...Jan 24, 2024 · The engine code P0128 in a Jeep Wrangler refers to a faulty thermostat or coolant temperature sensor. It indicates that the engine is not reaching its operating temperature within a specified time frame. Causes of Engine Code P0128 in a Jeep Wrangler. The potential causes of engine code P0128 in a Jeep Wrangler can include: If the coolant in the radiator is properly topped off and there's no issue with the radiator cap and the coolant (HOAT for a 2008) is still within 5 yrs./100K miles, this could be the issue: Update - Dealer called - TSB for P2181 code. NUMBER: 18-015-10 REV. GROUP: Vehicle Performance. DATE: August 12, 2010.Oct 28, 2023 · Frequently Asked Questions about the Jeep P0128 Code What is the normal engine operating temperature range? The normal operating temperature for the 3.6L Jeep JK Wrangler engine is around 195-220°F when warmed up and varying slightly based on operating conditions. If the PCM sees temperatures staying below 190°F, it will trigger the P0128 code. 1 post · Joined 2012. #11 · Feb 20, 2019. 2012 JKUR with the same problem. Check engine light and no codes either with my reader or the ignition key method. I had recently fueled up at a sketchy mini mart and thought that might be the culprit. Regardless, I checked the gas cap (was fine) and disconnected the battery for 10 minutes and the ...Feb 3, 2021 · Marissawalkerjones94 Discussion starter. 1 post · Joined 2020. #1 · Feb 3, 2021. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. My temp runs normal on my jeep, & everything runs normal. Feb 23, 2019 · ** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers... Quick, unedited cell phone video covering P0128 Data Trouble Code (DTC) on 2013 Jeep Wrangler JKUR w/3.6L V6 caused by a faulty thermostat tripping Check Eng...The code is P2096. I have only heard of TJs with this code, not JKs. Here's what I was doing: I was driving at about 50mph for 30 miles with about 4" of snow on the road. I had the gas pedal pushed way down just to maintain my speed. Under normal conditions, my Jeep would have been doing 90+mph with accelerator pushed so far down.My 2016 Jeep Wrangler JKU has been throwing up the CEL with a P0128 Code off and on during the winter months. The trouble code is generated by the engine coo...The most common cause for the P0128 code on a Jeep Wrangler is a faulty thermostat. A faulty thermostat can be what is described as a "stuck open thermostat." Other issues can be low coolant, a bad radiator fan or water pump, an inaccurate engine coolant temperature sensor (ECT sensor), or a bad engine control module. Check Out The Latest Price!CMSRock. 747 posts · Joined 2020. #13 · Jan 4, 2024. The p0128 shows up when the coolant temp doesn't come up fast enough or not at all, eventually depending on outdoor temp and travel speed it will get warm enough to bring up gage and give you heat but the code was set because it didn't warm up in the expected time.2014 Jeep Wrangler- Codes P2181 and P0128 Jump to Latest Follow 2K views 7 replies 4 participants last post by CarParts.com Jan 10, 2022Codes diagnose retrieve yj anza 2012-2016 jeep wrangler / cherokee Jeep wrangler code thermostat p0128 cherokee replace. Codes,codes,codes. Common 2007 to 2018 jeep wrangler jk problemsRetrieve and diagnose your check engine codes on a jeep wrangler yj Jeep jk wrangler p0203 p0303 misfire code fix.. Check Details Check …Jeep Code P0128 means that your Engine Coolant Temperature is below the thermostat regulating temperature. Simply put, the coolant which helps regulate your engine’s temperature is colder …** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers...My 2016 Jeep Wrangler JKU has been throwing up the CEL with a P0128 Code off and on during the winter months. The trouble code is generated by the engine coo...There can be different reasons causing the P0301 code to show up in your Jeep. Symptoms of a P0301 code vary depending on the cause. Here are some common symptoms of a P0301 code: A hard start or no start. Decrease in power. More fuel consumption. Stalling periodically, especially when the vehicle is idle. Rough idling.Learn the difference between source code and object code within computer programming. Each term has its own use; deciphering them can be difficult at first, but with this easy-to-f...#1 · Dec 21, 2016. CEL p0128 code 'coolant temp below thermostat regulating temp' This would show up on cold days. So I thought my IAT may be bad, so for $20 I changed …^!!! txt msgs r running language *ruining ^lol, jk!! :) In many casual discussions of language and the internet, it’s not uncommon to hear about how such “textspeak ruins language”...P0128 Code and Coolant - JK 2012 Rubicon. Okay, so my engine light came on today. Stopped by the auto parts store to have the code checked. Came back P0128 stating coolant temp below regular temp. So the guy suggested a thermostat said it is quite common.Feb 23, 2019 · ** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers... Tools Used:Milwaukee 2767-20 M18 Fuel High Torque 1/2-Inch Impact Wrench https://amzn.to/INNOVA 3612 Milwaukee Electric Tools 2557-20 M12 Fuel 3/8" RATCHETht...#1 · Aug 22, 2018. Hey guys, I just recently re-entered the Jeep world with a 2012 JKU sport auto. About two weeks ago while driving my jeep threw three codes. P0128 …Somewhere in between getting started with programming and being job-ready competent, you might experience the "desert of despair." Viking Code School explains why this struggle hap...Oct 9, 2016 · 2016 JK Rubicon Hard Rock Auto Trans 2008 Jeep Liberty Auto Trans 1988 E-150 4.9L 5 Speed Stick ... I'll post up if that's the corrective action for the P0128 code. Learn how you can improve your code quality in an instant following 3 simple rules that we cal Receive Stories from @gdenn Get free API security automated scan in minutesFeb 3, 2021 · Marissawalkerjones94 Discussion starter. 1 post · Joined 2020. #1 · Feb 3, 2021. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. My temp runs normal on my jeep, & everything runs normal. Do-It-Yourself instructions for replacing a thermostat housing in a 2012 Jeep Wrangler JK with a 3.6L V6 Pentastar engine. Fix the P0128 trouble code.P0112 Jeep Code - Intake Air Temperature Sensor 1 Circuit Low - Code Popularity: 14,565 Views - Repair Importance Level: 3/3 - Repair Difficulty Level: 2/3. Table of contents. Created and updated by William Orellana on Jun 14, 2020. Possible Causes; Description; How to Fix; What does this mean?2016 JKUHR Billet Silver M/T - (current odometer 54k, paid $35,500 OTD with 13.3k miles on 2/17/2018) - AEV 2.5 + Geo - Milestar 315 Patagona Mt's - Pro Comp 7069 FB Wheels - Rugged Ridge Hurricane Fender Flares - Poison Spider Bruisers and Rocker Knockers - RR Pioneer Platform - Bushwacker Sill Plate - Rigid Ds - Warn VR10-S - Teraflex HD Carrier,TB and SS - AEV Diff Covers - ARB Compact - 2x ...Ratchet said: P0128 sets when it takes longer than normal for the engine to reach operating temperature. Generally caused by a thermostat that is partially stuck open and/or low engine coolant. If there is a problem with the coolant temperature sensor, there are several trouble codes that can set for that as well.Follow up to the original question. My CEL has been on for a few days. Finally scanned last night and got the same code P0128. Coolant was pretty low, but not below the add line. I went ahead and topped off the coolant. Was hoping that's the simple fix before replacing the thermostat. The jeep is running fine, all the temperatures seem normal.P0108 is a generic OBD-II trouble code. It indicates your Jeep Wrangler's MAP (manifold absolute pressure) sensor's voltage reading is outside of the normal operating range. The voltage is too high. It's most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming intoAbout 63,000 Jeeps are being recalled because their engines might suddenly shut down. Fiat Chrysler Automobiles is voluntarily recalling about 62,000 Jeep Wrangler 4xe electric hyb...What to watch for today What to watch for today US retail sales on a roll? Analysts predict a 0.8% increase in sales in June, the biggest jump in four months. The Empire State manu...Jeep Code P0128 means that your Engine Coolant Temperature is below the thermostat regulating temperature. Simply put, the coolant which helps regulate your engine’s temperature is colder …Jan 24, 2020 · T. tonydee Discussion starter. 37 posts · Joined 2017. #1 · Jan 24, 2020. Hi, In my 2013 JKU (40,000 mi) I'm getting a P0128 code. This is happening frequently here in south east Pennsylvania in the winter. It did happen once in the summer. I keep clearing the code with my ODB II scanner. The temp is running 169-174 deg F according to the OBD ... Aug 27, 2015 · Tweet. To check your JK Codes, use this sequence on your ignition. Insert Ignition Key. Turn vehicle On-Off-On-Off-On. Codes will be shown on the Odometer screen. B1402 - Front Left Audio Speaker Output Circuit High. B1403 - Front Left Audio Speaker Output Circuit Open. B1405 - Front Right Audio Speaker Output Circuit Low. Impressive lineup of Easter Jeep Safari concepts from Jeep® heading to Moab, Utah, April 1-9Seven one-of-a-kind Jeep concept vehicles take four-wh... AUBURN HILLS, Mich., March 30,... To reset the p0128 code on a jeep wrangler, disconnect the battery for a few minutes and then reconnect it. When the code reappears, it indicates a persistent issue that needs to be fixed. The p0128 code is related to the engine coolant temperature being below the expected range. This could be caused by a faulty thermostat, a coolant leak, or a ... Nov 5, 2018 · Fixing P0128 in the Jeep Cherokee is usually a pretty easy thing to do since, 90% of the time, a stuck thermostat will cause the problem. Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. When a thermostat is stuck open, it allows ... What is the Cost to Diagnose the Code? Labor: 1.0. The cost to diagnose the P1607 Jeep code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.Mar 25, 2022 · 2016, 3.6 Check Engine light P0128 coolant temp code Jump to Latest Follow 7K views 15 replies 7 participants last post by KiwiScott Mar 31, 2022 Jan 24, 2024 · The P0128 code on a 2015 Jeep Wrangler typically indicates a problem with the engine coolant temperature. To fix this issue, it is recommended to first check the coolant level and ensure it is at the proper level. If the coolant level is low, topping it off may resolve the issue. However, if the coolant level is fine, the thermostat may need to ... =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0128 Saving Repair Part...Jun 17, 2023 · The most common cause for the P0128 code on a Jeep Wrangler is a faulty thermostat. A faulty thermostat can be what is described as a "stuck open thermostat." Other issues can be low coolant, a bad radiator fan or water pump, an inaccurate engine coolant temperature sensor (ECT sensor), or a bad engine control module. Check Out The Latest Price! P0128 - Thermostat Repalcement Question. 2013 JK. Recently started getting cold here in Texas. Had the Check Engine light come on with this stupid code. Reset, warmed up and code did not come back. Got cold again and it come on again, sot its on all the time. Did the research to the Thermostat and/ or the Temp Sensor on the side …1. What does the Jeep JK code P0128 indicate? The Jeep JK code P0128 is a Diagnostic Trouble Code (DTC) that indicates a problem with the Engine Coolant …My 2016 Jeep Wrangler JKU has been throwing up the CEL with a P0128 Code off and on during the winter months. The trouble code is generated by the engine coo...JK Diagnostic Codes 2007 – 2018. Below are the Diagnostic Trouble Codes ... P0128: Thermostat Rationality: P0129: Barometric Pressure Out-of-range Low: P0131: O2 Sensor 1/1 Circuit Low: ... Jeep Model Codes; Jeep VIN Decodes by Vehicle; Off Road & Automotive Terms; Quick Primer on Shock Absorbers; Tech – Oil: Additives (Detergents) ...

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jeep jk code p0128

Aluminum flywheel Aluminum drive shaft ECU flash tuner Cold air intake Large bore throttle body The 5.7 HEMI engine is available in the Dodge, Chrysler and Jeep vehicles, making it...A thermostat when operating properly will start to open at 203° and will be fully opened at 215°. Most thermostats that fail, fail in the opened position. The engine runs to cold for to long, and then throws a code. Your engine cooling temp, must reach 160°, with-in 15 minutes, or it will throw a code..FYI. Watch as I replace the thermostat on my 2015 Jeep Wrangler Unlimited after getting the P0128 Error Code. Fixing P0128 in the Jeep Cherokee is usually a pretty easy thing to do since, 90% of the time, a stuck thermostat will cause the problem. Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. When a thermostat is stuck open, it allows ...2013 JK with Mopar 2in lift on Pinter Silver wheels with BF KO2 35in. Save Share. Like. ... P0128 code definition Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means The P0128 code means that the engine coolant is not getting warm enough, fast enough. ... A forum community …The P0455 Jeep code occurs when the PCM detects a large EVAP leak. Symptoms include an illuminated CEL, subpar engine performance, stalling, and excessive exhaust smoke (among others). A malfunctioning gas cap or a defective emissions control system component can cause the fault code. However, the list does not end there.1004. ECU Battery Feed & Power Grounds. 1005. System Ground Circuit. 1006. EGR/EVAP Solenoid Circuit Low. 1007. EGR/EVAP Solenoid Circuit High. 1008.JK Wrangler (model years 2007 - 2018) Engine code P0128. Jump to ... I recently had an engine light come on in my 2013 Wrangler Sport, 2dr. 6 cyl. Code was P0128. I found the code issue. My coolant reservoir was low. No leaks found. I added fluid and cleared the code (disconnected the battery for an hour). ... Engine Code P0128 on …2014 Jeep Wrangler- Codes P2181 and P0128 Jump to Latest Follow 2K views 7 replies 4 participants last post by CarParts.com Jan 10, 2022Tweet. To check your JK Codes, use this sequence on your ignition. Insert Ignition Key. Turn vehicle On-Off-On-Off-On. Codes will be shown on the Odometer screen. B1402 - Front Left Audio Speaker Output Circuit High. B1403 - Front Left Audio Speaker Output Circuit Open. B1405 - Front Right Audio Speaker Output Circuit Low.P0128-THERMOSTAT RATIONALITY. For a complete wiring diagram,refer to the Wiring Information . When Monitored and Set Conditions. When Monitored: This diagnostic runs when the following conditions are met: - With the engine running. - Start up coolant temperature less than 65°C (149°F).The engine code P0128 in a Jeep Wrangler refers to a faulty thermostat or coolant temperature sensor. It indicates that the engine is not reaching its operating temperature within a specified time frame. Causes of Engine Code P0128 in a Jeep Wrangler. The potential causes of engine code P0128 in a Jeep Wrangler can include:Just bought a 2015 jeep grand Cherokee last week with 99k miles. It is the 3.6L v6. No check engine light when I drove off the lot. FFW roughly 50 miles. Check engine light came on. Odd.. and convenient for the dealership or very bad timing for me. ... Your engine would not get up to full operating temp, and clearly the code P0128 is likely as ...Ratchet said: P0128 sets when it takes longer than normal for the engine to reach operating temperature. Generally caused by a thermostat that is partially stuck open and/or low engine coolant. If there is a problem with the coolant temperature sensor, there are several trouble codes that can set for that as well.This video goes through Troubleshooting for a P0128 engine code. We go through what problems may be associated and how we decided to change the thermostat vs...107 posts · Joined 2013. #1 · Mar 23, 2015. I recently got a code "P0128 thermostat rationality" on my 2015 Jeep SRT. I first had a Jet 180 thermo and recently switched to a Mishimoto 180. Anybody else ever get this code? Is there a way to clear and see if it comes back without going to dealer? Like..

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